Enrollment
1,024
Illinois · 2024-25 NCES data
Middle school (grades 6-8) · Arlington Heights, IL
Thomas Middle School
Federal NCES profile for Thomas Middle School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 49/100.
2024-25 NCES dataMiddle school (grades 6-8)NCES 170414000106
👥 S:T ratio 47
🌟 Gifted program 30
📋 Attendance 71
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Thomas Middle School earns 49/100 on the Resource Investment Index, with class sizes near the Illinois median.
- #7 of 13
- public schools in Arlington Heights · Resource Index
- 49
- Resource Index · Higher
- 13.3:1
- students per teacher
- 1,024
- students enrolled
Thomas Middle School has class sizes near the Illinois median. Computed live against every Illinois school reporting to NCES.
By Resource Investment Index, Thomas Middle School ranks #7 of 13 public schools in Arlington Heights, IL.
School address
District: Arlington Heights Sd 25 · Illinois
NCES ID 170414000106 Verify on NCES CCD record →
Teachers (FTE)
72.0
Federal CCD staff survey
Students per teacher
13.3:1
vs 14:1 Illinois avg
-5% vs state
Student-teacher ratio in context
How Thomas Middle School compares with Illinois and U.S. medians
What stands out at Thomas Middle School
Thomas Middle School is a large middle school in Arlington Heights, Illinois, enrolling 1,024 students.
At 13.3:1, its student-teacher ratio sits close to the Illinois median, within a few percentage points of the 14:1 state norm, neither notably crowded nor notably small.
By headcount it is one of the larger campuses in Illinois, bigger than 93% of state schools at 1,024 students.
Its Resource Investment Index lands in the upper third of 3,845 scored Illinois schools.
Its student body is led by White (71%) and Asian (17%) (diversity index 47/100).
11.7% of students were chronically absent in the 2021-22 collection, in line with the post-pandemic national range.
The federal civil-rights collection also records 1 expulsion at this campus for 2021-22.
Among Arlington Heights's middle schools, it stands alongside South Middle School (812 students): Thomas Middle School is larger than that campus by headcount and runs heavier classes (13.3:1 vs 12.7:1).
Arlington Heights Sd 25 also operates South Middle School (812 students) and Olive-Mary Stitt School (671 students) alongside Thomas Middle School.
Sourced from NCES CCD, CRDC, and F-33 (federal records, not a quality verdict). How we source and compute this.
Source: National Center for Education Statistics Common Core of Data + CRDC + F-33 · 2024-25
How Thomas Middle School compares
Thomas Middle School on the metrics families compare, against Illinois and U.S. means.
| Metric | This school | vs Illinois | Illinois avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 13.3:1 | ▼ 5% | 14:1 | 15.7:1 |
| Enrollment | 1,024 | top 7% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
13.3:1
Leaner classes than 66% of US schools, among the more generously staffed nationally.
1,024
Bigger than 92% of US schools by enrollment, a large campus nationally.
Equity indicators (what these measure)
Staffing depth
13.3:1
students per teacher
- 5% below state mean
Top 46% in Illinois - lower ratio than 54% of state schools
Close to the 15:1 benchmark most often cited for individualized attention.
Engagement
11.7%
chronically absent (missed 10%+ of school days)
In the 10-15% range, above the pre-pandemic national baseline but within the broader post-pandemic picture.
Funding equity
$17,811
per pupil, district-wide
- above Illinois avg of $17,042
Somewhat above the U.S. public-school average, reflecting higher local or state investment per enrolled student.
Support staff
Counselors0.0 FTE
Student-support staffing from the Civil Rights Data Collection.
Discipline context
19
in-school suspensions + 5 out-of-school
Suspension rate: 1.9 per 100 students. Combined in-school and out-of-school rate: 2.3 per 100 students. Reported via the Civil Rights Data Collection. Includes 1 expulsion.
Overview
Enrollment 1,024 Top 7% in Illinois - larger than 93% of 3,845 state schools
Teachers (FTE) 72.0
Students per teacher 13.3:1 -5% vs state
Free-lunch eligible -
NCES ID 170414000106
Student demographics
White 70.5%
Asian 17.0%
Hispanic or Latino 9.2%
African American 1.6%
Native Hawaiian / Pacific Islander 1.0%
Two or More 0.6%
American Indian / Alaska Native 0.2%
Largest group: White at 70.5% of enrollment.
Student-body diversity index 46.5/100
Simpson diversity index - at 46.5, Thomas Middle School is more mixed than the Illinois school average of 38.9.
Programs & staff
Counselors (FTE) 0.0
Discipline & special education
Chronically absent 11.7%
In-school suspensions 19
Out-of-school suspensions 5
Expulsions 1
Funding & spending
District-wide per-pupil expenditure for Arlington Heights Sd 25, which includes Thomas Middle School.
$17,811
Per student
+5%
vs Illinois
Avg $17,042
+7%
vs U.S.
Avg $16,593
Revenue mix
Local 69.9%
State 24.8%
Federal 5.3%
Source: NCES F-33 School District Finance Survey District-level finance · FY 2021-22 Per-pupil expenditure reflects the district-wide average. Individual school budgets are not reported at the federal level.
How Thomas Middle School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| South Middle School | Similar size | No free-lunch data | Similar S:T ratio |
| Olive-Mary Stitt School | Smaller | No free-lunch data | Higher S:T ratio |
| Westgate Elem School | Smaller | No free-lunch data | Similar S:T ratio |
| Ivy Hill Elem School | Smaller | No free-lunch data | Higher S:T ratio |
| Dryden Elem School | Smaller | No free-lunch data | Higher S:T ratio |
Comparisons are relative to Thomas Middle School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 812
- Students per teacher
- 12.7:1
- Resource Index
- 49/100
- Enrollment
- 671
- Students per teacher
- 16:1
- Resource Index
- 48/100
- Enrollment
- 633
- Students per teacher
- 12.5:1
- Resource Index
- 53/100
- Enrollment
- 593
- Students per teacher
- 16.1:1
- Resource Index
- 42/100
- Enrollment
- 521
- Students per teacher
- 15.6:1
- Resource Index
- 49/100
Similar middle schools in Arlington Heights
1 comparable middle schools (grades 6-8) serving the same city.
Next steps
Verify locally before acting on Thomas Middle School's federal record.
- Compare Thomas Middle School against another school. Compare schools
- Arlington Heights Sd 25's spending and staffing shape this school. District profile
- Confirm current enrollment and boundaries with the school. Choosing guide
Federal record (CCD 2024-25, CRDC 2021-22) - PlainSchools assigns no subjective rating; the composite quality score is a transparent, reproducible index computed from this cited federal data.
Frequently asked questions about Thomas Middle School
How many students attend Thomas Middle School?
Thomas Middle School has 1,024 students enrolled. It is a middle school in Arlington Heights, IL.
What is the student-teacher ratio at Thomas Middle School?
The student-teacher ratio at Thomas Middle School is 13.3:1, which is 5% lower than the Illinois average of 14:1 and 15% lower than the national average of 15.7:1. Lower ratios generally mean more individual attention per student.
What is the racial and ethnic makeup of Thomas Middle School?
The largest demographic group at Thomas Middle School is White at 70.5% of enrollment, in Arlington Heights, IL.
What is the Resource Investment Index for Thomas Middle School?
Thomas Middle School has a Resource Investment Index of 49/100 (higher reported resources relative to schools nationally) based on 3 factors: student-teacher ratio, attendance rates. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Thomas Middle School rank among public schools in Arlington Heights?
By Resource Investment Index, Thomas Middle School ranks #7 of 13 public schools in Arlington Heights, IL. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all public schools in Arlington Heights on the city page.
Is Thomas Middle School a good school?
Thomas Middle School earns 49/100 on the Resource Investment Index, with class sizes near the Illinois median. This is a resource snapshot, not an academic rating; see the Resource Investment Index question above for what the number does and doesn't measure.
What other schools are in Arlington Heights Sd 25?
Besides Thomas Middle School, Arlington Heights Sd 25 also operates South Middle School (812 students), Olive-Mary Stitt School (671 students), and Westgate Elem School (633 students). See the Arlington Heights Sd 25 district page for the complete list.